On 7/07/2011, at 5:50 AM, Jim Lucas wrote:

> On 7/5/2011 7:52 PM, Jim Giner wrote:
>> And what do you use to cut down on spam in your in-box? 
> This is completely off topic, but here it goes...
> When I received an email the other day from your mail server, I had created 
> this
> crazy ass reply to your automatic request for a reply.  But in turn, just sent
> the email with the link showing that your mail server is a source of spam.
> To answer your question, I use built in Postfix checks...
> Here are my list of options:
> reject_invalid_hostname,
> reject_non_fqdn_hostname,
> reject_non_fqdn_sender,
> reject_non_fqdn_recipient,
> reject_unknown_sender_domain,
> reject_unknown_reverse_client_hostname,
> reject_unknown_recipient_domain,
> check_recipient_maps,
> permit_mynetworks,
> permit_sasl_authenticated,
> reject_unauth_destination,
> check_helo_access hash:/etc/postfix/helo_checks,
> reject_invalid_helo_hostname,
> reject_non_fqdn_helo_hostname,
> reject_unknown_helo_hostname,
> reject_rbl_client zen.spamhaus.org,
> reject_rbl_client psbl.surriel.com,
> reject_rbl_client korea.services.net,
> permit
> With the above settings, I REJECT 99.9% of all SPAM that tries to enter my 
> box.
> You are currently listed in my /etc/postfix/helo_checks file as
>  REJECT Your mail server is a source of SPAM.  Fix it!

I use grey-listing. It temporarily rejects emails from servers it doesn't 
recognise, which stops most spam but actual email gets through as they 
(correctly) retry.

I also have a learning bayesian filter running in my mail client (Apple's 
Mail), which handles the spam that gets through the greylist.
Simon Welsh
Admin of http://simon.geek.nz/

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